EP3090718B1 - Soulagement de pression de décharge multimode du sacrum dans une surface de support de patient - Google Patents

Soulagement de pression de décharge multimode du sacrum dans une surface de support de patient Download PDF

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Publication number
EP3090718B1
EP3090718B1 EP16168176.2A EP16168176A EP3090718B1 EP 3090718 B1 EP3090718 B1 EP 3090718B1 EP 16168176 A EP16168176 A EP 16168176A EP 3090718 B1 EP3090718 B1 EP 3090718B1
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EP
European Patent Office
Prior art keywords
controller
support
patient
target
inflatable support
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Application number
EP16168176.2A
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German (de)
English (en)
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EP3090718A1 (fr
Inventor
Charles A. Lachenbruch
Rachel Williamson
Kathryn Smith
Robert Mark Zerhusen
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Hill Rom Services Inc
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Hill Rom Services Inc
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/05—Parts, details or accessories of beds
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/08—Fluid mattresses or cushions
    • A47C27/081—Fluid mattresses or cushions of pneumatic type
    • A47C27/082—Fluid mattresses or cushions of pneumatic type with non-manual inflation, e.g. with electric pumps
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/08—Fluid mattresses or cushions
    • A47C27/081—Fluid mattresses or cushions of pneumatic type
    • A47C27/083—Fluid mattresses or cushions of pneumatic type with pressure control, e.g. with pressure sensors
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/08—Fluid mattresses or cushions
    • A47C27/10—Fluid mattresses or cushions with two or more independently-fillable chambers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/05—Parts, details or accessories of beds
    • A61G7/057—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor
    • A61G7/05769—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with inflatable chambers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2200/00—Information related to the kind of patient or his position
    • A61G2200/30—Specific positions of the patient
    • A61G2200/32—Specific positions of the patient lying
    • A61G2200/322—Specific positions of the patient lying lateral
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/001—Beds specially adapted for nursing; Devices for lifting patients or disabled persons with means for turning-over the patient

Definitions

  • the present disclosure relates to patient support apparatuses, such as hospital beds, for example, which include active support surfaces. More specifically, the present disclosure relates to patient support apparatuses which detect a patient's position and change operating characteristics of the patient support apparatus based on the patient's position.
  • Patient support apparatuses such as hospital beds, for example, include actuators for moving articulated sections.
  • the beds may include mattresses that have various bladder structures which support the patient and, in some cases, move the patient to provide therapy.
  • An exemplary support assembly is described in international patent application publication number WO 2014/081521 A2 , in the name of PRS MEDICAL TECHNOLOGIES, INC..
  • a patient support apparatus includes a mattress having plurality of inflatable support cushions for supporting a patient's body, and a controller having at least one processor and at least one memory device including instructions that, when executed by the at least one processor, (i) determine a position of the patient's body on the mattress and (ii) select at least one inflatable support cushion of the plurality of inflatable support cushions as a target inflatable support cushion for deflation based on the determined position of the patient's body.
  • the controller selects the target inflatable support cushion based on a user input.
  • the patient support apparatus includes at least one rotation actuator, wherein the user input is a user selection of one of a supine position, a fetal position, and a custom target cushion mode.
  • the controller selects the target inflatable support cushion based on a location of greatest pressure.
  • the controller receives a least one pressure signal indicating the location of greatest pressure, and selects the target inflatable support cushion based on the pressure signal.
  • the controller deflates the target inflatable support cushion and inflates at least one inflatable support cushion adjacent to the target inflatable support cushion.
  • an inflation amount of the at least one adjacent inflatable support cushion is one of a predetermined amount and a calculated amount, to unload a sacral region and or a trochantal region without unduly increasing pressure in surrounding areas.
  • the patient support apparatus includes at least one pressure sensor for each of the plurality of inflatable support cushion selected from the group of: piezo electric pressure sensor, an immersion sensor, a tape switch, and pressure-sensitive fabric.
  • the at least one memory device includes instructions that, when executed by the at least one processor, operate the at least one rotation actuator such that the mattress performs a lateral rotation.
  • the target inflatable support cushion corresponds to a location of a patient's trochanter.
  • the controller adjusts at least one parameter of the lateral rotation based on a user adjustment input.
  • the controller selects the target inflatable support cushion based on a user input.
  • the at least one memory device includes instructions that, when executed by the at least one processor in response to user selection of the supine position, select the target inflatable support cushion as one of the plurality of inflatable support cushions located about 5-7.6 cm (2-3 inches) headward of an area of greatest pressure.
  • the at least one memory device includes instructions that, when executed by the at least one processor in response to user selection of the fetal position, select the target inflatable support cushion as one of the plurality of inflatable support cushions located at an area of greatest pressure.
  • the at least one memory device includes instructions that, when executed by the at least one processor in response to user selection of the custom target cushion mode, select the target inflatable support cushion as one of the plurality of inflatable support cushions based on a user selection of a specific inflatable cushion of the plurality.
  • the target inflatable support cushion corresponds to a location of a patient's sacrum.
  • the patient support apparatus includes at least one rotation actuator; wherein the at least one memory device includes instructions that, when executed by the at least one processor, operate the at least one rotation actuator such that the mattress performs a lateral rotation.
  • the controller receives a least one pressure signal indicating the location of greatest pressure during the lateral rotation, and selects the target inflatable support cushion based on the pressure signal.
  • the lateral rotation is a continuous lateral rotation cycle and the controller selects the target inflatable support cushion based on a current position of the continuous lateral rotation therapy cycle.
  • the current position is one of a rightward inclination, a horizontal position, and a leftward inclination.
  • the plurality of inflatable support cushions includes independently controllable bladders disposed laterally across a central region of the mattress.
  • FIG. 1 An illustrative patient support apparatus embodied as a hospital bed 10 is shown in Fig. 1 .
  • the bed 10 includes a head end 22 and a foot end 24.
  • the bed includes a frame 12 extending from a floor and including an articulated deck 20 that includes a number of sections that are pivotable relative to one another to change the orientation of the deck 20.
  • the bed 10 includes a patient support surface 16 illustratively embodied as an upper surface 31 of a mattress 28 for supporting a patient, the mattress 28 supported on the deck 20.
  • the bed 10 also includes a control system 111 operable, among other things, to determine the location of the patient's body experiencing the greatest load pressure on the mattress 28 and a specific support bladder 30 relative to the location of the patient's body, and to automatically unload the specific (target) support bladder 30 to reduce the pressure on the patient's sacrum and or trochanter, depending on the orientation of the patient.
  • a control system 111 operable, among other things, to determine the location of the patient's body experiencing the greatest load pressure on the mattress 28 and a specific support bladder 30 relative to the location of the patient's body, and to automatically unload the specific (target) support bladder 30 to reduce the pressure on the patient's sacrum and or trochanter, depending on the orientation of the patient.
  • Fig. 2 shows a support bladder system 1000 of the bed 10.
  • the support bladder system 1000 includes the plurality of support bladders 30 of the mattress 28 .
  • the support bladders 30 are oriented laterally across the mattress 28 and run successively from the head end 22 to the foot end 24 of the bed 10.
  • the support bladders 30 each have generally the same size, shape, and are positioned without any spaces between adjacent support bladders 30.
  • the support bladders 30 are located beneath an upper mattress surface 31.
  • the support bladders 30 may be limited to be positioned over a portion or portions of the mattress 28, oriented with the same or varying spaces between adjacent support bladders 30, and or as having the same or different spacing, dimensions, shape, or other configuration to accommodate particular correspondence to a patient's body regions or other features of a specific embodiment of mattress. In some embodiments, the support bladders 30 may be oriented beneath, inside, or above other portions of the mattress 28, for example, upper mattress surface 31.
  • the patient's back can be properly unloaded when the patient is in the supine position.
  • determining the location greatest load pressure on the patient support surface 16 it has been found that the location of the patient's trochanter 60 can be very accurately identified relative to the patient support surface 16.
  • the location of patient support surface 16 having the greatest load pressure corresponds directly with the location of the patient's trochanter 60.
  • the location of the patient's trochanter 60 can be accurately inferred in the fetal position.
  • the patient's trochanter 60 can be properly unloaded when the patient is in the fetal position.
  • the support bladders 30 are oriented successively across at least a central region of the mattress 28.
  • the support bladders 30 each have a width w from head end 22 to foot end 24 of the bed 10 equal to or less than about 7.6 cm (3 inches).
  • Each support bladder 30 has a height h somewhat greater than its width w.
  • each support bladder 30 may have various sizes, shapes, proportions, and configurations including various heights, widths, and relative proportions thereof.
  • a pressurized fluid source 100 is connected to one or more of the support bladders 30 by a network of fluid supply tubes 102 and corresponding valves 104 for supplying pressurized fluid, typically ambient air, to the support bladders 30.
  • the pressurized fluid source 100 is a single blower connected to each of the support bladders 30 by at least one dedicated valve 104 and at least one dedicated fluid supply tube 102.
  • the pressurized fluid source may be one or more pumps, compressors, fans, other pressurizers and or any combination thereof.
  • the pressurized fluid source 100 may be connected to multiple support bladders 30 through a plurality of valves 104 and or a plurality of tubes 102 or through a manifold arrangement.
  • the pressurized fluid source 100 is operated to compress fluid and transfer the fluid into the support bladders 30 to thereby increase the pressure in the support bladders 30.
  • the valves 104 are operated to control the flow of the fluid, to and or from the support bladders 30.
  • the pressurized fluid source 100 can also be operated in a vacuum to assist with the removal of fluid out of the support bladders 30, thereby reducing the pressure in the support bladders 30.
  • valves 104 may facilitate venting a support bladder 30 to atmosphere to reduce the pressure in the support bladder 30.
  • a control system 111 includes a user interface 116, a controller 110 and several communication links 114.
  • User interface 116 is configured to allow a bed occupant, a caregiver, or other user to communicate user inputs to the controller 110 by way of a number of communication links 114.
  • the controller 110 communicates with pressurized fluid source 100 by way of a communication link 114.
  • Pressure readings from pressure sensors embodied as pressure transducers 92 associated with each of the support bladders 30 are communicated to the controller 110 by communication links 114.
  • the pressure readings from the pressure transducers 92 are indicative of the pressure in the respective support bladders 30.
  • the pressure transducers 92 are individual piezo electric pressure sensors for support bladder 30 which are in direct fluid communication with the interior of the corresponding support bladder 30.
  • pressure sensing may be determined by one or more immersion sensors, tape switches, force sensing resistors, pressure sensitive fabric, load cells, or any other load or pressure sensing device for each support bladder 30.
  • multiple sensors may be used with any support bladder 30.
  • the controller 110 comprises at least one processor 113 and at least one memory device 117.
  • the memory device 117 stores instructions for execution by the processor 113.
  • the controller 110 receives information from the pressure transducers 92 and the user interface 116, via the communication links 114, as inputs to the processor 113 in executing the instructions stored in the memory device 117, and outputs signals to the pressurized fluid source 100, to the fluid control valves 104, and or to other components of the bed 10 to control the operation of the patient support surface 16.
  • the controller 110 controls each support bladder 30 individually. In some embodiments, the controller 110 may also control groups of support bladders 30 organized in zones.
  • the instructions stored in the memory device 117 include at least one control algorithm.
  • Controller 110 instructions may also include reference charts, lookup tables, or the like and may be updated through a communication link (not shown) to support debugging, enhanced features, and or updated control design.
  • the communication link may be a connector that allows an external device to mechanically connect to controller 110 to create an electrical connection or may be a wireless link between an external device and the controller 110.
  • Fig. 3 indicates a flow chart of an unloading sequence, and the steps of the unloading sequence are described in detail hereafter.
  • a support bladder 30 relating to a specific portion of a patient's body is selected and depressurized to relieve contact pressure between the specific portion of the patient's body and the mattress 28.
  • unloading is initiated directly by user initiation via the user interface 116. In some embodiments, unloading may be directly or indirectly initiated by periodic initiation, by a triggering event, user initiation, and or any combination thereof.
  • the controller 110 receives communication from the transducers 92 indicating the pressure within each support bladder 30.
  • the controller 110 determines whether the patient 15 is in a supine position by determining if a user has selected the supine position on the user interface 116. In some embodiments, the controller 110 may determine whether the patient is in the fetal position by execution of instructions stored in the memory device 117 by processor 113 based on pressure inputs from the transducers 92 and or other inputs received from other bed components. At steps 102-104, the controller selects the target support bladder 30a from the support bladders 30 based on inputs from any of the transducers 92 and the user interface 116.
  • the controller 110 calculates the amount of inflation to be provided to adjacent support bladders 30b to achieve unloading and communicates command signals to any of the pressurized fluid source 100, valves 104, and or any other bed components to achieve the calculated amounts of inflation.
  • new user input can be inputted to the unloading sequence.
  • the controller 110 determines the location of greatest load pressure 28a on the patient support surface 16 based on inputs from the transducers 92 indicating the pressure levels within the support bladders 30.
  • the processor 113 executes instructions stored in the memory device 117 according to inputs from the transducers 92 to determine the location of greatest load pressure 28a on the patient support surface 16.
  • the controller 110 stores the determined location of greatest load pressure 28a, load input information, and other inputs in the memory device 117.
  • the controller 110 determines the location of greatest load pressure 28a of the patient support surface 16 based on pressure inputs from the transducers 92 of the mattress 28.
  • the controller 110 determines the location of greatest load pressure 28a on the patient support surface 16 based on transducer 92 inputs from one or more specific regions of the mattress 28, such as the central region 35.
  • the processor 113 executes instructions stored in the memory device 117 to determine the location of the patient's sacrum 50 based on the determined location of greatest load pressure 28a from step 102.
  • the processor 113 determines the location of the sacrum 50 by executing instructions which identify a location on the mattress 28 corresponding to a location about 5-7.6 cm (2-3 inches) headward of the determined location of greatest load pressure 28a.
  • the controller 110 selects the support bladder 30 corresponding to the location of the patient's sacrum 50, as the target support bladder 30a.
  • the processor 113 executes instructions stored in the memory device 117 to select the support bladder 30 which best corresponds to the location of the patient's sacrum 50 identified at step 103.
  • the support bladder 30 best corresponding to the location of the patient's sacrum is the support bladder 30 located about 5-7.6 cm (2-3 inches) headward of the location of greatest load pressure 28a on the patient support surface 16.
  • the controller 110 deems the selected support bladder 30 as the target support bladder 30a and stores the selection in the memory device 117.
  • the controller 110 calculates the amount of inflation to be provided to the adjacent support bladders 30b.
  • the processor 113 executes instructions stored in the memory device 117 to calculate the amounts of inflation required of each of two adjacent support bladders 30b which are adjacent to the target support bladder 30a.
  • the instructions include a number of control algorithms to determine a required amount of increased support pressure to accommodate unloading of the sacrum without unduly increasing the interface pressure in the surrounding areas of the patient 98.
  • the controller 110 receives communication of inputs from the transducers 92 indicating the pressure within the support bladders 30.
  • the controller 110 determines the amount of inflation of the adjacent support bladders 30b based on the inputs received by the controller 110.
  • the amounts of inflation are calculated based on the total patient's body weight as indicated by the inputs from the transducers 92, and the adjacent support bladders 30b are embodied as one support bladder 30 directly adjacent either side of the target support bladder 30a. In some embodiments, the amounts of inflation may be calculated based on the particular distribution of the patient's body weight, inputs from the user interface 116, other inputs to the controller 110 indicating bed configuration, and or any combination thereof; and the adjacent support bladders 30b may include any number of support bladders 30 on either side of the target support bladder 30a. In the illustrative embodiment, the amounts of inflation of the adjacent support bladders 30b are embodied as individual amounts of inflation. In some embodiments, the amounts of inflation may be common to adjacent support bladders 30b.
  • the controller 110 communicates to the pressurized fluid source 100 and fluid valves 104 to deflate the target support bladder 30a and to inflate the adjacent support bladders 30b their respective amounts of inflation according to step 105.
  • the processor 113 sends command signals to the pressurized fluid source 100 and fluid valves 104 indicating the required valve positions and fluid source operating conditions to achieve the pressure levels determined at step 105.
  • the unloading sequence has been described to require deflation of the target support bladder 30a, and inflation of the adjacent support bladders 30b, from their current pressurization levels.
  • the unloading sequence may require inflation or deflation of the target support bladder 30a and or inflation or deflation of any of the adjacent support bladders 30b to the appropriate level as determined by the controller at step 105, by the same or similar manner as described above, according to the condition of the support bladders 30 immediately preceding the execution current execution of step 106.
  • a new user input can be communicated to the controller 110 from the user interface 116.
  • the controller 110 receives the new user input to determine a new target support bladder 30a based on the new user input. If a new user input is communicated, in a similar manner as discussed above, the controller 110 returns to steps 103-106, and based on the new user input performs determining a new location of greatest load pressure 28a, determining a new sacrum location 50, calculating a new inflation amount for adjacent support bladders 30b, and or providing control signals for new pressurization levels of any of the support bladders 30.
  • the controller 110 in returning to steps 103-106, the controller 110 produces a new result for each step. However, in returning to steps 103-106, the result of any step based on the new user input may be the same result as the previous execution of the step, according to the magnitude of the impact of the new user input on the individual step of the sequence.
  • the controller 110 performs revision of steps 103-106, based on new inputs from the transducers 92, and or other bed components.
  • the controller 110 periodically receives a new input from the transducer and revises the steps 103-106 based on that new input.
  • the controller may perform revisions upon a triggering event such as change in the pressure inputs from the transducers 92, a user initiation, or by any combination thereof.
  • the controller 110 determines whether the patient is in a fetal position. In the illustrative embodiment, the controller 110 determines whether a user has selected the fetal position on the user interface 116. In some embodiments, the controller 110 may determine whether the patient is in the fetal position by execution of instructions stored in the memory device 117 by processor 113 based on pressure inputs from the transducers 92 and or other inputs received from other bed components. If the controller 110 determines the patient is in the fetal position, the controller 110 performs steps 109-111.
  • the controller 110 selects the target support bladder 30a based on inputs from the transducers 92 indicating a load pressure over each of the support bladders 30. In some embodiments the controller 110 may selects the target support bladder 30a based on inputs from any of the user interface 116, the transducers 92, and or other bed components.
  • the controller 110 calculates the amounts of inflation to be provided to adjacent support bladders 30b to achieve unloading and communicates command signals to any of the pressurized fluid source 100, valves 104, and or other bed components to achieve the calculated amounts of inflation.
  • new user input can be inputted to the unloading sequence.
  • the controller 110 determines the location of greatest load pressure 29a on the patient support surface 16 based on inputs from the transducers 92 indicating the pressure levels within the support bladders 30.
  • the processor 113 executes instructions stored in the memory device 117 according to inputs from the transducers 92 to determine the location of greatest load pressure 29a on the patient support surface 16.
  • the controller 110 stores the determined location of greatest load pressure 29a and the load input information in the memory device 117.
  • the controller 110 determines the location of greatest load pressure 29a on the patient support surface 16 based on pressure inputs from the transducers 92 of the entire mattress 28.
  • the controller 110 determines the location of greatest load pressure 29a based on transducer 92 inputs from one or more specific regions of the mattress 28, such as the central region 35.
  • the controller 110 determines the location of the patient's trochanter.
  • Processor 113 executes instructions stored in the memory device 117 based on the determined location of greatest load pressure 29a from step 109 to determine the location of the patient's trochanter 60.
  • the controller 110 stores the location of the patient's trochanter 60 in the memory device 117.
  • the controller 110 determines the location of the trochanter 60 to be the same as the location of greatest load pressure 29a.
  • the controller 110 may determine the location of the patient's trochanter 60 at a position different from the location of greatest load pressure 29a according to the inputs from the transducers 92.
  • the controller 110 selects a support bladder 30 corresponding to the location of the patient's trochanter 60 as the target support bladder 30a.
  • the processor 113 executes instructions stored in the memory device 117 to select the support bladder 30 corresponding to the location of the patient's trochanter 60 identified at step 110, and the controller 110 deems the selected support bladder 30 as the target support bladder 30a.
  • the controller 110 stores the selection in the memory device 117.
  • the controller 110 calculates the amounts of inflation to be provided to adjacent support bladders 30b based on the pressure inputs from the transducers 92.
  • the processor 113 executes instructions stored in the memory device 117 to determine the amounts of inflation required of each of two adjacent support bladders 30b which are adjacent to the target support bladder 30a.
  • the instructions include a number of control algorithms to determine a required amount of increased support pressure required from the adjacent support bladders 30b to accommodate unloading of the trochanter without unduly increasing the interface pressure in the surrounding areas of the patient 98.
  • the amounts of inflation required are determined based on the inputs from the transducers 92 received by the controller 110.
  • the amounts of inflation are calculated based on the total patient's body weight as indicated by the inputs from the transducers 92. In some embodiments, the amounts of inflation may be calculated based on the distribution of the patient's body weight, inputs from the user interface 116, other inputs to the controller 110 indicating bed configuration, and or any combination thereof.
  • the adjacent support bladders 30b may include any number of support bladders 30. In the present embodiment, the amounts of inflation of the adjacent support bladders 30b are embodied as individual amounts of inflation. In some embodiments, the amounts of inflation may be common to adjacent support bladders 30b.
  • the processor 113 communicates to the pressurized fluid source 100 and valves 104 to deflate the target support bladder 30a and to inflate two adjacent support bladders 30b their amounts according to step 112.
  • the unloading sequence is described as requiring deflation of the target support bladder 30a, and or inflation of the adjacent support bladders 30b, from their current pressurization levels. However, the unloading sequence may require inflation or deflation of the target support bladder 30a and or inflation or deflation of any of the adjacent support bladders 30b to the appropriate level as determined by the controller at step 112, by the same or similar manner as described above, according to the condition of the support bladders 30 immediately preceding the current execution of step 113.
  • a new user input can be communicated to the controller 110 from the user interface 116.
  • the controller 110 receives the new user input to determine a new target support bladder 30a based on the new user input. If a new user input is communicated, in a similar manner as discussed above, the controller 110 returns to steps 110-113, and based on the new user input performs determining a new location of greatest load pressure 28a, determining a new sacrum location 50, calculating a new inflation amount for adjacent support bladders 30b, and or providing control signals for new pressurization levels of any of the support bladders 30.
  • the controller 110 in returning to steps 110-113, the controller 110 produces a new result for each step. However, in returning to steps 110-113, the result of any step based on the new user input may be the same result as the previous execution of the same step, according to the.
  • the controller 110 performs revision of steps 110-113, based on new inputs from the transducers 92, and or other bed components.
  • the controller 110 periodically receives a new input from the transducer and revises the steps 110-113 based on that new input.
  • the controller may perform revisions upon a triggering event such as change in the pressure inputs from the transducers 92, a user initiation, or by any combination thereof.
  • the controller 110 executes a custom unloading sequence.
  • the controller 110 receives inputs from the user interface 116 indicating a selection by a user for custom unloading. Inputs include any of user selection of a user-selected target support bladder 32 and user adjustment of mattress 28 and or bed 10 parameters.
  • the controller 110 selects the target support bladder 30a based directly on the user-selected target support bladder 32 via the user interface 116.
  • the controller 110 calculates the amounts of inflation to be provided to adjacent support bladders 30b to achieve unloading and communicates control signals to any of the pressurized fluid source 100, valves 104, and or any other bed component to achieve the calculated amounts of inflation.
  • a new user input can be inputted to the unloading sequence.
  • the user selects a user-selected target support bladder 32 on the user interface 116.
  • User selection is embodied as direct user selection of the user-selected target support bladder 30a, but may also be embodied as indirect user selection.
  • the controller 110 receives inputs from the transducers 92 indicating a load pressure on the patient support surface 16 and communicates the load pressure information to the user interface 116 for pictorial display 400 (see Fig. 4 ) for assisting the user in selecting the target support bladder 30a and adjusting other parameters.
  • the pictorial display may include current, time-lapsed, or period-averaged load pressure information.
  • the user interface overlays the load pressure information by color code onto a diagram 33 of the support bladders 30 shown on the user interface screen.
  • the load pressure information may be displayed on the user interface in any variety of ways to assist in user inputs including any of shading, coloring, or numbering.
  • the pictorial display indicates the current user-selected target support bladder 32 by displaying the corresponding support bladder 30 as depressed on the diagram 33.
  • the current user-selected target support bladder 32 may be indicated by color, indicator, marker, and or any other indication means.
  • the controller 110 receives the user-selected target support bladder 32 from the user interface 116 as user input.
  • the user can adjust parameters of the mattress 28 on the user interface 116.
  • Parameters of the mattress 28 include overall mattress firmness, fine adjustment of the target bladder pressurization levels, fine adjustment of adjacent support bladder pressurization levels, and or other preference-based settings. These user adjustments are embodied as performed via slider bar, but may be embodied as a percentage, or other user interface configuration.
  • the controller 110 receives the user adjusted parameters from the user interface 116 as user input.
  • the controller 110 selects the target support bladder 30a according to the user-selected target support bladder 32 at step 116.
  • the processor 113 executes instructions stored in the memory device 117 to select a support bladder 30 corresponding to the user-selected target support bladder at step 116, and the selected support bladder 30 is deemed the target support bladder 30a.
  • the controller 110 stores the selection in the memory device 117.
  • the controller 110 calculates the amounts of inflation to be provided to adjacent support bladders 30b.
  • the processor 113 executes instructions stored in the memory device 117 to determine the amounts of inflation required of each of two adjacent support bladders 30b which are adjacent to the target support bladder 30a.
  • the instructions include a number of control algorithms to determine a required amount of increased support pressure to accommodate unloading of the trochanter without unduly increasing the interface pressure in the surrounding areas of the patient.
  • the amounts of inflation required of the adjacent support bladders 30b are calculated based on input received from the transducers 92 by the controller 110. In the illustrative embodiment, the amounts of inflation are calculated based on the total patient's body weight as indicated by the inputs from the transducers 92.
  • the amounts of inflation may be calculated based on the distribution of the patient's body weight, inputs from the user interface 116, other inputs to the controller 110 indicating bed configuration, and or any combination thereof.
  • the adjacent support bladders 30b may include any number of support bladders 30.
  • the amounts of inflation of the adjacent support bladders 30b are embodied as individual amounts of inflation.
  • the amounts of inflation may be common to adjacent support bladders 30b.
  • the processor 113 communicates to the pressurized fluid source 100 and valves 104 to deflate the target support bladder 30a and to inflate the two adjacent support bladders 30b their calculated amounts of inflation according to step 119.
  • the processor 113 sends command signals to the pressurized fluid source 100 and fluid valves 104 indicating the required valve positions and fluid source operating conditions to achieve the pressure levels determined at step 119.
  • the custom unloading sequence is described as requiring deflation of the target support bladder 30a, and inflation of the adjacent support bladders 30b, from their current pressurization levels.
  • the unloading sequence may require inflation or deflation of the target support bladder 30a and or inflation or deflation of any of the adjacent support bladders 30b to the appropriate level as determined by the controller at step 105, by the same or similar manner as described above, according to the condition of the support bladders 30 immediately preceding the execution current execution of step 120.
  • a new user input can be communicated to the controller 110 from the user interface 116.
  • the controller 110 receives the new user input to determine a new target support bladder 30a based on the new user input. If a new user input is communicated, in a similar manner as discussed above, the controller 110 returns to steps 117-120, and based on the new user input performs determining a new location of greatest load pressure 28a, determining a new sacrum location 50, calculating a new inflation amount for adjacent support bladders 30b, and or providing control signals for new pressurization levels of any of the support bladders 30. In the illustrative embodiment in returning to steps 117-120, the controller 110 produces a new result for each step. However, in returning to steps 117-120, the result of any step based on the new user input may be the same result as the previous execution of the step according to the magnitude of the impact of the new user input on the individual step of the sequence..
  • the controller 110 performs revision of steps 117-120, based on new inputs from the transducers 92, and or other bed components.
  • the controller 110 periodically receives a new input from the transducer and revises the steps 117-120 based on that new input.
  • the controller may perform revisions upon a triggering event such as change in the pressure inputs from the transducers 92, a user initiation, or by any combination thereof.
  • a user may operate the bed for lateral rotation of a patient as therapeutic for the patient, to assist in bed making, or to generally assist movement of the patient.
  • a user can select performance of lateral rotation via the user interface 116.
  • the rotation bladders 41 are in a deflated state.
  • the mattress 28 of the bed 10 is laterally rotated to a laterally inclined position by inflating rotation bladders 41 located on a corresponding side of the bed to elevate the bed side while maintaining rotation bladders 41 on the rotation side of the bed in a deflated state, as illustrated in Figs. 5A-5C .
  • the rotation bladders 41 may initially be in any of a deflated state, partially inflated state, or fully inflated state, and lateral rotation may be achieved by any combination of inflation and deflation of rotation bladders 41 on opposing sides of the bed.
  • the disparate inflation amounts of the rotation bladders 41 create lateral inclination of the mattress 28 and corresponding lateral rotation of the patient support surface 16. Laterally inclining patient support surface 16 puts the bed's occupant in a laterally inclined position.
  • Lateral rotation of the mattress 28 includes static user-selected lateral rotation and continuous lateral rotation therapy. Lateral rotation may include pressure unloading.
  • Static lateral rotation includes rotation of the mattress 28, and corresponding lateral rotation of the patient support surface 16, to any of a horizontal, right-inclined, or left-inclined position, relative to the floor as indicated in Figs. 5A-5C .
  • Static lateral rotation includes user-selection of a fixed laterally-rotated position. A user selects a direction, leftward or rightward, for static lateral rotation via the user interface 116 and may customize the inclination angle between a minimum and maximum range.
  • the static lateral rotation is maintained until a different static position is entered over the user interface 116.
  • the static lateral rotation can also be maintained for a predetermined duration before returning to a horizontal mattress position illustrated in Fig. 3B .
  • Continuous lateral rotation therapy includes periodic rotation of the mattress 28, and corresponding lateral rotation of the patient support surface 16, to any of a horizontal right-inclined, or left-inclined position, relative to the floor as shown in Figs. 5A-5C .
  • the angle of right-inclination, angle of left-inclination, and or duration of each position is set as a default configuration stored in the memory device 117.
  • a user can adjust any of the angles of right-inclination, angle of left-inclination, and or duration of each position via the user interface 116 from zero to 100% of maximum range.
  • a user may select to eliminate any of the right-inclined, left-inclined, and or horizontal positions from the cycle.
  • Figs. 5A-5C illustrate the mattress 28 including rotation actuators, embodied as rotation bladders 41.
  • the rotation bladders 41 extend generally along the longitudinal direction of the mattress 28. At least one rotation bladder 41 is positioned on either side of a center line z running longitudinal along the center of the mattress 28.
  • rotation bladders 41 generally have the same size, shape, and construction. In some embodiments, a rotation bladder 41 may differ from other rotation bladders 41 in size, shape and or construction dependent on its specific position with respect to the mattress 28.
  • rotation bladders 41 on opposite sides of the center line z have mirrored configurations and extend generally from the head end 22 to the foot end 24 of the bed 10.
  • the rotation bladders 41 are oriented with the same spacing between adjacent rotation bladders 41 and are a part of the mattress 28 without spacing between adjacent rotation bladders.
  • the rotation bladders 41 may extend along a limited portion or portions of the mattress 28; may have different spacing between adjacent rotation bladders; may be positioned in any other manner with respect to the support bladders 30; and or may be separate from the mattress 28 and attached directly or indirectly to the frame 12.
  • rotation bladders 41 are inflated and deflated by a rotation pressurized fluid system 220.
  • the rotation pressurized fluid system 220 includes a pressurized fluid source 200, pressurized fluid control valves 204, tubes 202, and controller 210.
  • the controller 210 includes at least one processor 213 and at least one memory device 217.
  • rotation pressurized fluid system 220 is a separate pressurized fluid system from support bladder pressurization system 120 and controller 210 is embodied as a separate controller from controller 110.
  • rotation pressurized fluid system 220 is a combined fluid system with that of support bladder pressurization system 120, and may combine any of their components such as a common pressurized fluid source or sources, valves, tubing or other hardware or software components.
  • the controller 210 may be the same controller as controller 110, a separate processor and memory device on the same board as controller 110, and or as sharing any of the components of controller 110.
  • Fig. 7 indicates a flow chart of a sequence of continuous lateral rotation therapy cycle.
  • CLRT is activated illustratively by a user selection via the user interface 116.
  • the controller 210 sends command signals to the valves 204 and or pressurized fluid source 200 of the rotation actuator system 220 to activate the rotation bladders 41 to achieve the first position of the cycle.
  • the controller 210 sends command signals to the valves 204 and pressurized fluid source 200 of the rotation actuator system 220 to pressurize the rotation bladders 41 to achieve the second position of the cycle.
  • the controller 210 determines whether a third position is required.
  • the controller 210 sends command signals to the valves 204 and or the pressurized fluid source 200 of the rotation actuator system 220 to activate the rotation bladder 41 to achieve the third position of the lateral rotation cycle for the predetermined duration.
  • an overall cycle counter T is increased.
  • CLRT is activated illustratively by user initiation via the user interface 116.
  • the processor 213 executes instructions to set an overall cycle counter T to zero and the overall count is stored in the memory device 217.
  • CLRT activation may be initiated periodically, by triggering event, by user initiation, or any combination thereof.
  • the controller 210 receives inputs from the user interface 116 and the transducers 93.
  • the processor 213 executes instructions stored in the memory device 117 based on the inputs from the user interface 116, transducers 93, to determine the first position of the CLRT cycle and the corresponding pressurization levels of the rotation bladders 41 to achieve the first position of the cycle.
  • the processor 213 sends the inputs, mattress positions, and pressurizations levels, to the memory device 217 for storage.
  • the controller 210 sends command signals to the valves 204 and pressurized fluid source 200 indicating their appropriate configuration, based on the results of the instructions, for achieving the determined first position.
  • the controller 210 communicates to the controller 110 such that the controller 110 determines and controls the support bladder pressurization system 120 to pressurize the support bladders 30 to accommodate the first position of the CLRT cycle.
  • the controller 210 monitors the position of the valves 204, pressurized fluid source 200 operation, pressures of the rotation bladders 41, position of the mattress, and or intermediate parameters to infer the positions, pressures, and operation, to determine when the first position of the CLRT cycle has been achieved by the mattress 28.
  • the controller 210 determines that the first position has been achieved, the controller 210 begins a first position counter t 1 from zero.
  • the rotation actuators are rotation bladders 41 operated by a rotation pressurized fluid system 220 including pressurized fluid source 200, valves 204, and tubes 202, but may be embodied as any type of actuator system to provide lateral rotation, including but not limited to, hydraulic, electric, and or magnetic actuators with commensurate actuation systems, and any combinations thereof including the processor 213 executing instructions to determine the commensurate actuator positions.
  • the controller 210 operates to control each rotation bladder 41 individually. In some embodiments, the controller 210 may operate to control each rotation bladder 41 as part of a group of rotation bladders 41.
  • Steps 302 and 303 show an illustrative counter flow sequence. After the predetermined time X 1 has elapsed, the first position counter t 1 at step 303 is satisfied by achieving at least the predetermined time X 1 , and the sequence progresses.
  • the predetermined time X 1 is a default time stored in the memory device 117 but can be adjusted by a user on the user interface 116.
  • the controller 210 receives inputs from the user interface 116 and the transducers 93 and controls the rotation actutator system 220 to achieve the second position of the CLRT.
  • the processor 213 executes instructions stored in the memory device 217 based on the inputs from any of the user interface 116 and the transducers 93 to determine the second position of the CLRT cycle and the corresponding pressurization levels of the rotation bladders 41 to achieve the second position of the cycle.
  • the processor 217 sends the inputs, positions, pressurizations levels, or intermediate information to the memory device 217 for storage.
  • the controller 210 sends command signals to the valves 204 and or pressurized fluid source 200 providing their appropriate configuration, based on the results of the instructions, for achieving the second position of the cycle.
  • the controller 210 communicates to the controller 110 such that the controller 110 determines and controls the support bladder pressurization system 120 to pressurize the support bladders 30 to accommodate the second position of the cycle.
  • the controller 210 monitors the position of the valves 204, operation of pressurized fluid source 200, pressures of rotation actuators 41, and position of the mattress 28 to determine when the second position of the CLRT cycle has been achieved by the mattress 28.
  • the controller 210 determines the second position of the cycle has been achieved, the controller 210 begins a second position counter t 2 from zero.
  • Steps 305 and 306 show a timer or counter configuration. After the predetermined time X 2 has elapsed, the second position counter at step 306 is satisfied, and the sequence progresses.
  • the predetermined time X 2 is a default time stored in the memory device 117 but can be adjusted by a user on the user interface 116.
  • the controller 210 determines whether a third position is required according to the user selections for the CLRT cycle via the user interface 116.
  • the controller determines whether a third position is required according to default conditions stored within the memory device 217. If the third position is not required, for example, when deselected by a user via the user interface 116; the sequence progresses to step 311. If the third position is required, the sequence progress to step 308.
  • the controller 210 receives inputs from the user interface 116 and the transducers 93.
  • the processor 213 executes instructions based on the inputs to determine the third position of the CLRT cycle and the corresponding pressurization levels of the rotation bladders 41 to achieve the third position of the cycle.
  • the processor 213 sends the inputs, positions, pressurizations levels, or intermediate information to the memory device 217 for storage.
  • the controller 210 sends command signals to any of the valves 104 and or pressurized fluid source 200 indicating their appropriate configuration, based on the results of the instructions, for achieving the third position of the cycle.
  • the controller 210 communicates to the controller 110 such that the controller 110 determines and controls the support bladder pressurization system 120 to pressurize the support bladders 30 to accommodate the third position of the cycle.
  • the controller 210 monitors the position of the valves, pressurized fluid source operation, rotation actuator position, position of the mattress, to determine when the third position of the cycle has been achieved by the mattress 28.
  • the controller 210 determines that the third position has been achieved, the controller 210 begins a third position counter t 3 from zero.
  • the controller 210 sets the overall cycle counter T to increase.
  • the controller 210 determines if the overall cycle counter is equal to or greater than the predetermined time K. If the predetermined time K has been achieved or exceeded by the overall cycle counter T, the sequence ends and the controller 210 sends commands signals to the valves 204 and pressurized fluid source 200 to configured the rotation bladders to achieve the horizontal position. If the predetermined time K has not been achieved or exceeded, the sequence returns to step 301.
  • Lateral rotation can be performed with an unloading sequence as described above.
  • the operations illustrated by the flow charts of Figs. 7 and 8 are shown in separate figures but illustratively operate in parallel.
  • the controller 210 determines whether unloading sequence has been selected by a user via the user interface 116. If an unloading sequence has been selected, the controller 210 sends an initiation signal to the controller 110 to begin the sequence illustrated in Fig. 8 .
  • the controller 110 illustratively determines whether a right or left inclination is active as indicated by the initiation signal from controller 210. If a right or left inclined position is determined to be active, the sequence progresses to step 202.
  • Steps 202-206 operate similarly to the steps described above for unloading. If an inclined position is not determined to be active, the sequence progresses to step 207 to determine if a horizontal position is active. If a horizontal position is active, the sequence progresses to step 208 for unloading. Steps 208-212 operate similarly to the steps described above for unloading. In some embodiments, controller 110 may directly determine whether an unloading sequence has been selected via the user interface 116, and or may determine whether a right or left inclination is active by inputs from the transducers 92 and or any other bed component.
  • step 200 in Fig. 8 may operate in parallel at each of steps 301, 304, and 308 or may be integrated as additional steps of the same operation.
  • Inputs from the user interface, transducers 92, 93, and or any other bed component are stored in the memory devices 117, 217 and referenced by the processors 113, 213 throughout the unloading and or rotation processes.
  • the controller 110 may determine whether a right or left inclination is active by execution of instructions stored in the memory device 117 by the processor 113 based on pressure inputs from the transducers 92 and or other inputs received from other bed components.
  • the controller 110 selects the target support bladder 30a at steps 203 and 209 in accordance with the user-selected target support bladder 32 and calculates the inflation amount at steps 204 and 210 in accordance with the user-adjusted parameters.
  • the user can select a different user-selected target support bladder 32 for each position of the CLRT cycle.
  • the custom inputs are retained in the memory device 117 and used as inputs to the execution of the instructions by the processor 113 throughout the CLRT cycle and/or until modified by the user.
  • Each of the instructions of the illustrative embodiment include one or more control algorithms stored in the appropriate memory devices 117, 217 and executed by the appropriate processors 113, 213.
  • the instructions may include reference charts, lookup tables, or the like and may be updated through a communication link to support debugging, enhanced features, and or updated control design.
  • the described determinations, identifications, selections, and calculations are embodied to include consideration of previously stored information regarding any of the patient, the mattress 28, the bed 10, user inputs, transducer input, and or other information relevant to configuration of the mattress 28 as variables of the instructions.
  • the described determinations, identifications, selections, and calculations may be embodied to include consideration of any of currently existing, and or predicted information, regarding any of the patient, the mattress 28, the overall bed 10 or components thereof, information regarding any of inputs from the user interface 116, transducers 92, 93, and or any other bed component, and or other information relevant to configuration of the mattress 28 as variables of the instructions.
  • the described determinations, identifications, selections, and calculations performed by the controller may include consideration of any of currently existing, and or predicted information, regarding any of the patient may include consideration of previously stored, currently existing, or predicted information, regarding the patient, the mattress 28, the overall bed 10 or bed components, information from inputs from the user interface 116, transducers 92, 93, and or other bed components, and or other information relevant to configuration of the mattress 28 as variables of the instructions.
  • calculation of amounts of inflation for adjacent support bladders includes only calculation for the adjacent support bladders. In some embodiments, this calculation may include calculation of amounts of inflation for the target support bladder.
  • Any and or all user inputs include any user selection of operational preferences, toggling on/off of bed functions, adjustments to bed operations and or positions, and or any other direct or indirect user influence over bed configuration via the user interface 116.
  • Any and or all communication links may be partly or wholly wired with either permanent or detachable connections, and may also comprise wireless communication, or any combination of wiring and wireless configurations.
  • the patient support apparatus may be used in combination with various other patient support auxiliary devices and configurations including systems which may provide additional inputs to the controllers 110, 210 for consideration during execution of any instructions.

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Claims (13)

  1. Système de support de patient comprenant :
    un matelas (28), le matelas (28) comprenant une pluralité de coussins de support gonflables destinés à soutenir le corps d'un patient ;
    un dispositif de commande (110) comprenant au moins un processeur (113) et au moins un dispositif de stockage (117), le au moins un dispositif de stockage (117) comprenant des instructions qui, lorsqu'elles sont exécutées par le au moins un processeur (113), (i) déterminent une position du corps du patient sur le matelas (28) et (ii) choisissent au moins un coussin de support gonflable parmi la pluralité de coussins de support gonflables comme coussin cible à dégonfler en fonction de la position déterminée du corps du patient,
    caractérisé en ce que :
    le système comprend en outre au moins un actionneur de rotation ; et le dispositif de commande (110) choisit en outre le coussin de support gonflable cible en fonction d'une entrée utilisateur, l'entrée utilisateur étant un choix de l'utilisateur de l'un des éléments parmi une position couchée sur le dos, une position foetale et un mode de coussin cible personnalisé.
  2. Système selon la revendication 1, dans lequel le dispositif de commande (110) choisit le coussin de support gonflable cible en fonction d'un emplacement ayant la pression la plus élevée.
  3. Système selon la revendication 2, dans lequel le dispositif de commande (110) reçoit au moins un signal de pression indiquant l'emplacement ayant la pression la plus élevée et choisit le coussin de support gonflable cible en fonction du signal de pression.
  4. Système selon la revendication 3, dans lequel le dispositif de commande (110) dégonfle le coussin de support gonflable cible et gonfle au moins un coussin de support gonflable adjacent au coussin de support gonflable cible.
  5. Système selon la revendication 4, dans lequel une quantité de gonflage du au moins un coussin de support gonflable adjacent est l'une des quantités parmi une quantité prédéterminée et une quantité calculée, utilisée pour décharger une région sacrée et/ou une région trochantérienne sans augmenter excessivement la pression dans les zones environnantes.
  6. Système selon l'une quelconque des revendications précédentes, dans lequel le au moins un dispositif de stockage (117) comprend des instructions qui, lorsqu'elles sont exécutées par le au moins un processeur (113) en réponse à un choix de l'utilisateur de la position allongée sur le dos, choisissent le coussin de support gonflable cible comme l'un des éléments parmi la pluralité de coussins de support gonflables situés à environ 5 à 7,6 cm (2 à 3 pouces) en direction de la tête d'une zone ayant la pression la plus élevée.
  7. Système selon l'une quelconque des revendications précédentes, dans lequel le au moins un dispositif de stockage (117) comprend des instructions qui, lorsqu'elles sont exécutées par le au moins un processeur (113) en réponse à un choix de l'utilisateur de la position foetale, choisissent le coussin de support gonflable cible comme l'un des éléments parmi la pluralité de coussins de support gonflables situés au niveau d'une zone ayant la pression la plus élevée.
  8. Système selon l'une quelconque des revendications précédentes, dans lequel le au moins un dispositif de stockage (117) comprend des instructions qui, lorsqu'elles sont exécutées par le au moins un processeur (113) en réponse à un choix de l'utilisateur du mode de coussin cible personnalisé, choisissent le coussin de support gonflable cible comme l'un des éléments parmi la pluralité de coussins de support gonflables en fonction d'un choix de l'utilisateur d'un coussin gonflable spécifique parmi la pluralité.
  9. Système selon l'une quelconque des revendications précédentes, comprenant en outre au moins un actionneur de rotation, dans lequel le au moins un dispositif de stockage (117) comprend des instructions qui, lorsqu'elles sont exécutées par le au moins un processeur (113), font fonctionner le au moins un actionneur de rotation de telle sorte que le matelas (28) effectue une rotation latérale.
  10. Système selon la revendication 9, dans lequel la rotation latérale est un cycle de rotation latérale continue et le dispositif de commande (110) choisit le coussin de support gonflable cible en fonction d'une position actuelle du cycle de thérapie par rotation latérale continue.
  11. Système selon la revendication 9 ou la revendication 10, dans lequel le dispositif de commande (110) ajuste au moins un paramètre de la rotation latérale en fonction d'une entrée utilisateur d'ajustement.
  12. Système selon l'une quelconque des revendications précédentes, dans lequel la pluralité de coussins de support gonflables comprend des poches contrôlables indépendamment (30) disposées latéralement sur toute une région centrale du matelas (28).
  13. Système selon l'une quelconque des revendications précédentes, dans lequel le coussin de support gonflable cible correspond à un emplacement du trochanter d'un patient ou du sacrum d'un patient.
EP16168176.2A 2015-05-05 2016-05-03 Soulagement de pression de décharge multimode du sacrum dans une surface de support de patient Active EP3090718B1 (fr)

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